2018 Tesla Model 3 BaseFACTORY OEM SERVICE PROCEDURE

Software Reinstall (Li-Ion Battery)

CAUTION: Vehicle software version 2023.12 or newer is required in order to perform this procedure.
  1. Remove the rear underhood apron. See Underhood Apron - Rear (Remove And Replace) .
  2. Connect the LV maintainer to the vehicle, but do not disconnect the LV battery. See LV Maintainer (Connect and Disconnect) .
    NOTE: It is OK for the LV maintainer and LV battery to both be connected while performing this procedure.
  3. Enable Service Mode. See Service Mode .
  4. Go to the Service Mode menu: touch the Service Mode "wrench" icon at the bottom of the vehicle touchscreen.
    NOTE: Alternatively, for vehicles with older firmware versions: Touch Controls  (vehicle icon), and then touch Service Mode  .
  5. On the vehicle touchscreen, touch Software Reinstall > Reinstall  .
  6. Once the reinstallation is complete, check that the release notes appear on the touchscreen, indicating a successful reinstallation.
  7. Disconnect the LV maintainer from the vehicle. See LV Maintainer (Connect and Disconnect) .
  8. Disable Service Mode. See Service Mode .
  9. Install the rear underhood apron. See Underhood Apron - Rear (Remove And Replace) .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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